Summary of Significant Accounting Policies - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash and Cash Equivalents [Line Items]
Income taxes, net of refunds	$ 46,227	$ 229	$ (3,019)
Interest, net of amounts capitalized	245,271	227,584	216,951
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Accrued capital expenditures	114,999	167,733	113,502
Dividends declared but not paid	97,895	95,988	93,531
Arizona Public Service Company
Cash and Cash Equivalents [Line Items]
Income taxes, net of refunds	95,985	19,783	41,176
Interest, net of amounts capitalized	227,159	217,749	206,328
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Accrued capital expenditures	116,533	167,657	113,502
Dividends declared but not paid	$ 97,900	$ 96,000	$ 93,500